Engine valve



G. P. ABORN.

ENGINE VALVE.

APPLICATION FILED JULY 30. 191B.

BQL

G. P. ABOHN.

ENGINE VALVE.

APPLICATION FILED luLY 30.1918.

l ,43,59 l 9 l Patentei Non M, w22.

3SHEETS-SHEEY 2.

G. P. ABORN.

ENGINE VALVE.

APPLICATION FILED IuLY 30, I9I8.

Patented Nov. M, i922.

3 SHEETSSHEEI 3.

Patented Nov. Ill-l, i922.

il lil Wgr GEORGE P.` l-BORN, DE BROOKLNE. Mf-SSiC-USETTS, ASSIGNOR TO WORTHHLI'GTGN :PUMP AND lJIl-.CHXNER'Y' CORPORTGN, A CG'RPORATION OF V'IRGIlv'ti-L i ENGINE VALVE.

Application filed July 3G,

Be it known that l. GEORGE l. Anonn, a. citizen ot the United States, residing at Brookline. `countv ot' Norfolk. and State oi llilassachusetts, have invented certain new and useful Improvements in Engine Valves,

i'ullv described and represented in the following specification and the accoiupanyingl lrawi11gs, terminga part of the saine.

This invention relates to steam engines equipped with fluidaetuated valves and especialhv to such valve mechanism for en fines used in direct acting pumps.

The object of the invent-ion is to provide a simple and improved valve mechanism tor Working the steainexpansively and act-.ing to slow down the piston.' near the end'of its stroke in 'order to allow the valves'in the pump to 'seat quietly and with little shock and to secure au Veasy reversal ot the piston stroke. rllhis result is secured b v an auxil- -iary valve aetini; to cut oil the steam 'troni the main vibre for using the stean'i expansively and than controlling the reversal of the main halve. the action being similar to that of' in v prior Patent No'. 1,055,996, dated -llfilareh 18, 1913, but the present invention including improved means for securing this result.

ln the drawings Figure l is ay section longitudinally ol? the stean cylinder on the lines 1 1 of Figs. 2

and e.

Figure 2 is a. section longitudinally ot the auxiliary cylinder' on the lines 2-2 ol Figs. l and 3. .v

Figure is a section on the line 3 3 ot Fig. 2. i i

Figureis `a sectional plan view oi the auxiliary cylinder ports and passages.

Figure 5 is a plan view of the ste-ain cylinder showing;- its ports and passages; and

Figure. G is a side elevation of the engine showing suitable tappet zrear for operating` the auxiliary valve rod.

The main engine cylinder within which operates the piston 25 secured to pistonrod 26, isi provided with aseat for the auxiliary cylinder '4 which preferably is secured thereto at right anglesfto the axial line of the main cylinder. rfhis auxiliary cylinder seat is provided with the usual ports and passa-ges 8, connecting with the opposite endsjof the cylinder 5. This seat is also provided with suitable inlet and exhaust 191s. serial No. 247,364.

ports 27. 28 for the auxiliar)v c vlinder connected b v passages tothe steam inlet port 29 and exhaust port 3U.

rl`he auxiliary cylinder 4 is provided at its ends with annular ports 11, l2. connected by ay suitable iassng'e 2H' to the exhaust port and annular ports 7, 9 connected by passages t5", 10 respectively to the ports 8, 10 leading to the stealn'cylinder ends. 'lhat portion oi each end of the auxiliary cylinder 55 within which the piston 'portions oi' the main slide valve l operate is provided with the usual liner 5l having rings oi ports registering with the annular ports in the auxiliary cylinder walls.

Referring now partieularly to `Figures 2 and 2l. each piston portion ot the main slide valve 1 is i'orined to provide a ciiinparativl Wide annular exhaust port 32 and a narrow annular inlet port 32 which are connected 75 respectively to the exhaust passages 3l and to inlet passages 1T. 1C at opposite ends ot' the valve, these exhaust and inlet passages extending' longitudinally through the piston portions oi the main valve and connecting 5G to ports Controlled b v the auxiliary valve.

T he auxiliar)T valve seat fS-l is equipped with the steam .inlet ports 2l and 20 connectingrespectively7 with 17 and i6 tor deliver)Y of steam to the ports 9 and 7, 85 ports 15 and 13 cou'in'uinicating i'espectively b v passages 19 and 1S with the auxiliary evvlinder ends, and an exhaust port le connecting exhaust passages 31 for exhaust of steam used for shittingl the main slide valve l'.

'Mounted upon this valve seat is the auxiliarv valve 2 provided with combined inlet cut off ports 22, 23 and an exhaust cavitv '2l yfor connecting' the ports 1.3, 13 with the exhaust port 14. The auxiliary valve 2 95 is moved by valve rod (3 which is operated by the main piston rod 26 through actuating arm (o) 'carrying' tappet (o) which engages one or the other of the adjustable collars (c), or through other suitable means.

The operation of the mechanism is as tollows:

Assuming; the main valve to be at the right, as shown in Figure 2, being; held in this position by steam admitted to its left 105 by port l5 and passage 19, steam will pass 'through port 23 in the auxiliary valve7 port 2O and nassage 16 in the main slide valve, to anninar port As shown in Figures t2 and f3 annular port 33 is in Genies nication lio with port 7 in the auxiliary cylinder so that steam passes through port 8 in the main cylinder to the left of the main piston 25, causing it to move to the right. At the Same time steam will exhaust from the opposite side of the main piston through passage and port 10, port 9` in the auxiliary cy inder and port 32 in the main slide valve to port 12, and thus to exhaust port 28 and exhaust 30. As the main .piston 25 reaches a predetermined point in its stroke, depending upon the point of cut off desired, the tappet (11) engages with a collar (c) on valve rod 6, moving the auxiliary valve 2 to the left in Figure 1 until the steam port- 20'in the main valve is closed by the edge of port 23- in -the auxiliary Valve, thus cutting ofi' the steam supply to the main cylin der which from this point to release works expansively, and simultaneously opening the auxiliary port 13 in the main valve and admitting steam to the right of the main Valve through passage 18. Further movement of the auxiliary valve connects auxiliary port 15 in the main valve with cavity 24 permitting the exhaust of steam from the leftof the main valvethrough passage 19, and ports 15 and 14 to one of the exhaust passages 31 in the main valve which passages are always in communication with the exhaust port 28 through one or the other annular po'rt 32 and either port 11 or 12. The main valve will now move to the left and will continue its travel until the auxiliary port 15 is closed by the edge of the cavity 24 when the main valve will come to rest in its left-hand position registering the propel' poils for the return stroke of the main piston.

The construction as thus shown and described is the preferred embodiment of the invention; but it will he understood that the invention is not limited to the specic arrangement of parts illustrated, but that the broad features of the inventionas defined by the claims, may be embodied in ,other constructions.

What is claimed is 1. The combination with a main cylinder, of an auxiliary cylinder, a fluid actuated main valve having passages running lengthwise therethrough for delivery of steam to the main cylinder 'andto the auxiliary `cylinder endsfa valve face on the main valve, an auxiliary valve 'cooperating with said valve face, and ports by which the auxiliary valve controls the delivery of steam to said passages.

2. The combination with a main cylinder, of -an auxiliary cylinder thereon Aprovided with ports for the delivery of steam to and from the cylinder ends, a fluid actuated main piston valve operating within the `of the auxiliary cylinder for moving the `ing the steamexpansively in the main cylauxiliary cylinder and controllingits ports, a valve face on the main valve, passages running lengthwise through said main valve and connecting the ports of said main valve with said valve face, and an auxiliary valve Cooperating with said valve face to control through said ports the movement of the main valve. l 3. The combination with a cylinder of an auxiliary cylinder thereon provided with ports for the delivery of steam to and from the cylinder ends, a fluid actuated main piston valve located within the auxiliary cylinder and controlling its ports, a valve face on the main piston valve, passages running lengthwise through said main piston valve and connecting the ports of saidmain valve with said valve face, an auxiliary valve cooperating with said valve face to control through said ports the movement of` 80 the main valve and acting to cut off the supply of luid'to the main valve for use of the steam expansively in the main cylinder. 4. In combination, a main valve having its end portions forming piston valves with annular inlet and exhaust ports, and its central portion forming a Valve face, an auxiliary cylinder in which the main valve moves having annular steam ports controlled by said main valve, an auxiliary valve on said central valve face, ports controlled bysaid auxiliary valve for control ling the supply of steam to the annular. ports of the main valve, and to the ends main valve` and passages extending longitudinally through the main ZValve and connecting with said orts.,

The combination with a main cylinder and its steam ports, of an auxiliarycylinder thereon having annular ports for `steam supply land exhaust, a main valve in said auxiliary cylinder 'with its opposite ends forming piston valves controlling said annular ports and a valve face between said piston portions, vports in said valve face, 'and passages 16, 17 extendingl longitudinally through the main valve for the "supplyof steam to the main cylinder, and passages 18, 19, and 81 extending longitudinally 110 through the main valve'for the supply and exhaust of steam to and from the ends of the auxiliary cylinder for moving the main valve, and for delivery of such exhausted steam to the auxiliary cylinder exhaust ports and an auxiliary valve controlling said valve face ports and acting to cut ofi" the steam supply tothe main valvefor usinder. V

In testimony whereof, I have hereunto set my hand.

GEORGE P. ABORN. 

